Luminescence has been observed from water Irradiated
with an intense pulse of high energy electrons. The angular
dependence, electron energy dependence, visible spectrum,
lifetime and yield of the light emission have been determined.
In addition, the effect of additives on the emission was studied.
The emission spectrum of water was found to be identical to
that of methanol, oyclohexane and benzene. All of these results
lead to the conclusion that no light emission other than
Cerenkov radiation was present in the visible region of the
spectrum. The yield of Cerenkov radiation was found to be
GhV(4-5000Å)~6x10-4.